'Approved' transactions can be canceled. 'Declined' transactions cannot be canceled. As a result, in order to test the cancellation of a transaction, you must first pass an odd dollar amount. This will return the transaction with an 'Approved' status. Now, you can test the cancellation of that transaction.

An error could result from a variety of conditions such as missing data, invalid card numbers, and expiration dates provided in invalid formats.

### BluePay Ruby Sample code.## This code sample runs a $3.00 Credit Card Sale transaction# against a customer using test payment information.# If approved, a 2nd transaction is run to cancel this transaction.# If using TEST mode, odd dollar amounts will return# an approval and even dollar amounts will return a decline.##